Pitcher filters are water filtration systems designed to improve the taste and quality of drinking water. They typically consist of a plastic pitcher with a built-in filter that removes impurities, such as chlorine, sediment, and heavy metals. Users fill the pitcher with tap water, and as it passes through the filter, contaminants are trapped, resulting in cleaner water. These filters are convenient and affordable, making them popular for home use. Many brands, like Brita and PUR, offer various models with different filter types. Regular replacement of the filter is necessary to maintain effectiveness and ensure safe drinking water.